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WILLIAM S. KELLY, OF SOHENECTADY, NEW YORK.

PUMP.

Specification of Letters Patent No. 34,505, dated Februaryv 25, 1862.

[0 all 'whom it may concern:

Be it known that I, WILLIAM S. KELLY, of the city and county ofSchenectady and State of New York, have invented a new and usefulImprovement in Pumps and other Similar Hydraulic Machines; and I dohereby declare that the following is' a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l is afront view of the pump as improved by me. Fig. 2 is a verticaltransverse section of the same. Fig. 3 is a horizontal section in theline w-m of Fig. 2. Fig. 4 is also a horizontal section but in line y-y.Fig. 5 is a perspective view of the spider which confines theball'gvalves from lateral motion.

The same letters of reference in the several figures indicatecorresponding parts.

The nature of my invention consists-1st In arranging valves betweenupper and lower sets of passages so that they serve alternately forclosing said upper and lower sets of passages. 2nd In so boxing thevalves that the one set maintain their proper relative positions foralternately closing the upper and lower sets of passages. 3rd In soconstructing the annular spider that the water which enters the pumpchambers has a free passage above and below it to the hollow piston rod.4th In the combination of the base valve box having a narrow stop barover the center of each valve chamber;

with the double chambered pump hollowr piston and hollow piston rod. 5thIn the -combination of the hollow piston and piston rod, with astationary air chamber, by a loose ground joint or stuing box, at thelower end of the chamber, so that the compressed air in the air chambershall be more effectively employed for aiding in discharging the waterthrough the nozzle, than it is when the air chamber and piston rod areconnected by a tight oint and move up and down together.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction. and operation- A, is a pumpcylinder with a side or front chamber B communicating with it by a topport C. The cylinder A with its side chamber B, rests upon a base valvebox D, which is open at the top, and divided into two chambers by apartition, across the center y of the top of each of which a narrowVstop bar a, is placed. In each chamber a ball valve E, is arrangedloosely, being kept in place by theV stop a. The ball valves covercircular ports b, 25, in the bottom of the valve box.

F, is a hollow cylindrical piston with a cup ange c, around its upperedge.` From the center of the top of the piston a hollow piston rod G,of' about oneV third the diameter of the piston, extends upward andpasses out of the top of the pump cylinder as shown. Outside the circleof the piston rod a series of passages d, d, are cut through the top ofthe piston.

H, is an annularspider consisting of a ring e, and pronged arms f, f, f,f. The ring being of less depth than the arms, and forming a connectionwith them at thev center of their depth in such manner that when thespider is' clamped between two surfaces a space exists, both above andbelow, between said surfacesand the ring. The arms of the spider are ofcurve shape and form stops for ball valves g, and for clamping screws h.

I, is a screw clamping plate let loosely into the piston after thespider and the ball valves are introduced into the piston. This platehas passages z', z', i, z', cut through it, and is confined in place bymeans of the same screws h which prevent the spider from turning. All ofthe passages are made flaring so as to present/seats for the ballvalves.

J, is an air chamber with water discharging nozzle tapped in its side.This air chamber encircles the upper end of the hollow piston rod andthe piston rod works air.4

and water tight up and down in said chamber, a loose ground joint orstuiing box y', being employed to effect theconnection between thepiston rod and air chamber. The air chamber is suspended ina stationarycondition over the pump cylinder as represented, and the piston isworked by means of a connecting rod which attaches to a bracketextending out from the piston rod at av point between the air chamberand pump cylinder.

The operation of the pump is asffollows. The water first flows into thecylinder A and chamber B through the passages b, that is as the pistonrises water enters the passages b directly under the cylinder A, and llssaid cylinder. As the piston deso.mi

scends the valve E of the cylinder closes and the Valve E of the chamberB opens and allows water` to ll the chamber and the space of thecylinder outside of the piston4 rod. Simultaneously with the iniiowingof thewater into chamber B, the water which was first received into thecylinder escapes through the passages c', z', and under the ring of thespider into the hollow pistonits escape through the passages CZ,` el,being prevented by the ball Valves g, g, closing said passages. As thepiston again risesr the water which is in the chamber B, and the spaceoutside the hollow piston is allowed to escape down through the passagesCZ, d, andunder and above the spider into the hollow piston-its escapethrough the paspages 2', z', at this stage being prevented by the ballvalves g, g, closing the said passages-thus the operation continuesuntil the motionof the pump ceases. As the dischargingwater risesthrough the hollow piston into the air chamber the air, by reason of thepiston rising in the chamber and compressing it acts most eiectively forincreasing the force of the discharge through the nozzle. p

Having thus described my invention what I claim as new and desire tosecure by Letters Patent isl. The combination with the chambers A,

B, of a double acting pump, of a hollow piston rod Gr, and piston F, theValves g of the `piston F being Varranged between upper and lowerpassages cl, c', and the same set of `Valves g servingl alternatelyor'closing said vwith its arms f of greater depth than the depth of itsring or hollow hub c, substantially as and for the purposes set forth.

41. The combination of the base Valve boX D, having a narrow stop bar a,over the center of each of its valve chambers, with the doublechamberedpump A, B, hollow piston F, and piston rod G, substantially in,

the manner and for the purpose described.

,5. The `combination of the hollow piston F, and hollow piston rod Gr,with a stationary air chamber J, by astuiing box j at the lower end ofthe chamber J, substantially as and for the purposes set forth.

WILLIAM s. KELLY.

Witnesses:

RoBT. W. FENwIoK, GUsTAvUs DEITERICH.

